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1
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
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The effect of addition of butterfly pea leaf meal (Clitoria ternatea) in feed on the quality of color of swordtail fish head (Xiphophorus helleri)

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Rintan O. J., Andriani Y., Yuliadi L. P. S., Iskandar
World News of Natural Sciences
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2019
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tom 26
The aim of this study was to determine the effect of butterfly pea leaf as a source of carotenoids on the quality of the color of the heads of swordtail fish. The study was conducted at the Aquaculture Laboratory, Building 4, Faculty of Fisheries and Marine Sciences, Padjadjaran University, from March to April 2019. The research method used an experimental approach with Completely Randomized Design (CRD) consisting of 4 treatments and 3 replications. Those treatments are 0%, 1%, 6% and 12% of butterfly pea leaf meal. The parameters observed included changes in head color quality, absolute weight growth, absolute length growth and water quality. Color observation data were analyzed using Kruskal-Wallis analysis if there were differences between treatments. Multiple comparisons were performed with the Z test with a confidence level of 95%. Data on the length of growth rates and absolute weights were analyzed using analysis of variance via the F test. Here, 95% was set as the confidence level. If there were differences between treatments, this was followed by Duncan test with a confidence level of 95%. The results showed that the addition of 6% butterfly pea leaf meal in commercial feed was able to improve the best color on the part of the swordtail fish head. This saw an average color score 9.56 and color value of 82.2. Addition of carotenoids in feed, however, did not significantly influence the growth of absolute weight or length and water quality.
2

Influence of Indian Ocean Dipole phenomena towards the eddy variability in Southern Java Ocean

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Rachim F. R., Syamsudin M. L., Ritantini I., Yuliadi L. P. S.
World Scientific News
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2019
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tom 132
3

Surficial sedimentary at the bottom in waters surrounding the Arisen land of Putri Island, Karawang – Indonesia

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Harahap S. A., Yuliadi L. P. S., Sinulingga J. N.
World Scientific News
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2021
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tom 151
4

Diversity of Chlorophyta on Karapyak Beach, Pangandaran, West Java Province, Indonesia

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Hanifah S., Sahidin A., Hamdani H., Yuliadi L. P. S.
World Scientific News
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2019
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tom 117
5
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
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Abundance and distribution of sea urchins (Echinoidea Leske, 1778) on coral reefs in the waters of Latondu Island, Taka Bonerate, South Sulawesi, Indonesia

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Malik P. M., Riyantini I., Yuliadi L. P. S., Hamdani H.
World News of Natural Sciences
|
2019
|
tom 27
Sea urchin is one of the key biota of coral reef stability. Research on the abundance and distribution of urchins was carried out from January-August 2019 and field data retrieval occurred in March 2019 on Latondu Island, Taka Bonerate. This study aims to determine the relationship between sea urchin abundance with coral reef conditions and sea urchin distribution patterns in the waters of Latondu Island, Taka Bonerate. Observation of coral reefs and sea urchins was carried out at 3 stations with different criteria of coral reef conditions. Retrieval of coral reef data was done using the Point Intercept Transect (PIT) method, while sea urchin observation came about via a transect belt method. The results showed that in the waters of the island of Latondu, there were 133 sea urchins from 7 species of the Echinoidea class, namely Diadema setosum, Diadema antillarum, Echinometra mathaei, Echinotrix calamaris, Mespillia globulus, Heterocentrotus mammillatus and Echinotrix diadema. The largest abundance of sea urchins was found in Station 3 on the southern part of Latondu Island with 12 ind / 50m2, while Station 1 in the northeast and Station 2 in the northwest part showed 5 ind / 50m2. Sea urchin distribution at Station 1 with a value of 0.79 was uniform, Station 2 with a value of 0.80 was also uniform and Station 3 with a value of 0.91 was uniform as well. The relationship between Sea urchin and coral reef was 0.56, which meant the relationship was moderate and directly proportional.
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Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
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Conditions for sediment coating microplastic in mangrove ecosystems in Kupang and Rote, East Nusa Tenggara, Indonesia

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Zandhi R., Yuliadi L. P. S., Ismail M. R., Yuniarti M. S.
World News of Natural Sciences
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2019
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tom 27
The observation and direct sampling, as well as laboratory tests of this research was conducted from June until October 2018. This study aims to determine the existence of microplastics in the sediment of water bodies in Kupang and Rote Districts based on the number, type, size and abundance of microplastics. The data used in this study include the type of sediment, microplastic abundance and the characteristics of the data collection area. Microplastics are plastic particles sized less than 5 mm, and in our research, were divided into 4 types: manifold fiber, fragment, film and pellets. Herein, 849 particles of microplastic were found: 635 fibers, 160 particle fragments, and 54 particle films. The primary influencing factor for microplastic deposition is the sedimentary texture itself. Sediments of a coarse type do not capture as much microplastic as do sediments of a finer texture. Data collection area characteristics also affect accumulation.
7
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Seasonal distribution of Benthic foraminifera in Pangandaran waters, Indonesia

100%
Yuliadi L. P. S., Nurruhwati I., Astuty S.
World News of Natural Sciences
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2020
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tom 29
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nr 3
8

Microplastics patch based on hydrodynamic modeling in the North Indramayu, Java Sea

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Handyman D. I. W., Purba N. P., Pranowo W. S., Harahap S. A., Dante I. F., Yuliadi L. P. S.
Polish Journal of Environmental Studies
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2019
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tom 28
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nr 1
Marine debris becomes a global issue due to its impact to ecosystem, human life, and marine environment. Microplastic is one of the marine debris types that need further attention due to its long term effect in marine life. The aim of the study was to investigate the microplastic transport in Java Sea, Indramayu for seven months period. The result showed that the tidal reversing current was dominant in Java Sea, with average current speed 0.04 – 0.32 m/s. The type of tidal movement in North Indramayu, Java Sea is mixed tide prevailing semidiurnal. The transport of microplastic has a circular-reversing pattern due to influences from the currents and waves. According to the result of this study, the start point of microplastics could be estimated ranges in distance 0.9 – 5.4 km from the location where they were sampled seven months later. Microplastic that currently resides in Java Sea allegedly came from South China Sea and Pacific Ocean. The result also indicates that Java Sea has a high probability to become the largest microplastic patch in Indonesia due to its reversing current, which can trap those particles for a long time (7 months microplastics mileage range of 1258.90 km – 1399.88 km), whether they originate from other ocean region or from Indonesia itself.
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